Thanks for the response guys. I will be sure to ask the owner who will do the job, how many of these he has done and how many times was he successful without leaks. I'll also be sure to have him fix anything else he truthfully finds wrong once the job is underway. Thanks for the advice.

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Richie
1986 300E
tint windows
clear corners
euro headlights
16"silver borbet s type
soon to be 94/95 taillights